Article
Geosciences, Multidisciplinary
C. A. Sidor, J. A. Mcintosh, B. M. Gee, W. R. Hammer, P. J. Makovicky, N. D. Smith, R. M. H. Smith, N. J. Tabor, M. R. Whitney, C. H. Woolley
Summary: The Permian-Triassic rocks in the Transantarctic Basin offer a valuable record of high latitude paleoenvironments and terrestrial vertebrate faunas. This study summarizes the taxonomic and paleoecological implications of collected vertebrate fossils and presents new geological observations. The results reveal the similarities and differences between the Fremouw Formation and the Karoo Basin, as well as provide insights into the depositional environments and diagenetic alterations of these formations.
EARTH-SCIENCE REVIEWS
(2023)
Article
Multidisciplinary Sciences
Chase Doran Brownstein
Summary: During the Cretaceous period, terrestrial vertebrates experienced diversifications and turnovers due to global geographical change, although the poor fossil record from the early Late Cretaceous has concealed how dinosaurs and other terrestrial vertebrates responded to these events. This study describes two dinosaurs from the North American paleolandmass Appalachia, shedding light on the timing of important anatomical innovations in two widespread dinosaur lineages. The phylogenetic positions of the dinosaurs show similarities between Appalachian and Eurasian dinosaur faunas, indicating a degree of endemism in Appalachian dinosaur assemblages due to episodes of vicariance.
ROYAL SOCIETY OPEN SCIENCE
(2021)
Article
Geology
O. V. Vernygora, A. M. Murray
Summary: Armigatus is an extinct clupeomorph genus comprising five species, with A. alticorpus being the least studied. Recent material from Lebanon suggests that A. alticorpus can be included in phylogenetic analysis, revealing close affinities with younger species in the genus. Comparisons of multiple specimens allowed for the establishment of morphological traits aiding in species delimitation.
CRETACEOUS RESEARCH
(2021)
Article
Multidisciplinary Sciences
Dylan C. T. Rowe, Joseph J. Bevitt, Robert R. Reisz
Summary: Through the use of neutron tomography, the detailed description of the holotype skeleton of Delorhynchus cifellii has provided important new information about the cranial and postcranial anatomy of this early Permian parareptile. Previously unknown features of the skull and the exposure of the stapes in three dimensions have been revealed. The discovery of postcranial material in articulation with the skull allows for the first detailed description of vertebrae, ribs, shoulder girdle, and humerus of an acleistorhinid parareptile, leading to a reevaluation of its phylogenetic relationships.
Article
Geography, Physical
Kateryn Pino, Paulo Vallejos-Garrido, Nicolas Espinoza-Aravena, Rebecca B. Cooper, Daniele Silvestro, Cristian E. Hernandez, Enrique Rodriguez-Serrano
Summary: Sparassodonta, the main carnivorous predator in South America, faced extinction due to an increase in extinction rate during the Middle Miocene, possibly triggered by drastic regional landscape changes caused by the Andean uplift process. These environmental changes affected Sparassodonta lineages with their vulnerability to extinction by near-zero net diversification rate and highly specialized ecology.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Geosciences, Multidisciplinary
Yasser Salama, Jamaan S. Ajarem, Ahmed A. Allam, Ahmed M. Almalki
Summary: This study detailed 17 rudist species from the Barremian-Turonian marine formations in North Sinai, northern Egypt, providing insights into their geographic distribution and evolution during the Barremian-Turonian period.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2021)
Article
Geology
Qiulei Men, Zhengkun Hu
Summary: A new species of Leptotarsus (Longurio) burmica sp. nov. in Tipulidae from mid-Cretaceous Burmese amber is described and illustrated, representing the first record of Tipulidae in Burmese amber and the first member of Leptotarsus in Cretaceous amber inclusions.
CRETACEOUS RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Chao Fu, Xinghe Yu, Shunli Li, Zixiao Peng, Shi Shi
Summary: The study integrated multiple indices to reconstruct the paleo-water depth distribution and paleo-sea level in the Ordos Basin, showing that the second-order transgression/regression cycles were mainly influenced by local variations in sediment supply and regional uplift. The sediment provenance area was estimated using detrital zircon U-Pb data and REE content, indicating a shift from the uplifted Helan Mountain in the Carboniferous to multi-sourced detrital material from the Yinshan range and Qinling range in the middle Permian.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geology
Jithin Johnson, Stephanie F. Loria, Ulrich Kotthoff, Jorg U. Hammel, Mathew M. Joseph, Danilo Harms
Summary: This article reports the discovery of a new genus (Burmeochthonius) and two new species (Burmeochthonius kachinae and Burmeochthonius muelleri) of the pseudoscorpion tribe Tyrannochthoniini in mid-Cretaceous Burmese amber from northern Myanmar, extending the known fossil record of this group by approximately 75 million years. The study also discusses the evolution and biogeography of this tribe in tropical regions and suggests that the paleoclimate and paleoenvironments of Cretaceous Burmese forests were similar to those of present-day Myanmar.
CRETACEOUS RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Muhammad Murtaza, Abdul Hadi Abd Rahman, Joerg Mutterlose, Najiatun Najla, Mazshurraiezal Bin Nasir
Summary: The discovery of belemnite remains in Sarawak, Borneo suggests a widespread palaeobiogeographic distribution of the Hibolithes genus during the Jurassic-Cretaceous transition. The specimens found in the Pedawan Formation indicate a Tithonian-Hauterivian age, with characteristics such as multiple fractures and vein filling observed in the fossils.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2021)
Article
Geography, Physical
Tegan L. Beveridge, Eric M. Roberts, Jahandar Ramezani, Alan L. Titus, Jeffrey G. Eaton, Randall B. Irmis, Joseph J. W. Sertich
Summary: The new research on the Wahweap Formation provides important information about the terrestrial environments and biotic assemblages in the Cretaceous period, including revised stratigraphy and improved geochronology. This is significant for studying the geographic distribution and evolution of dinosaurs.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Gai Zhikun, Bai Zhijun, Lin Xianghong, Meng Xinyuan, Zhang Junwen
Summary: The Petalodontiformes are a small, intriguing group of Permo-Carboniferous chondrichthyans, with the discovery of seven well-preserved Petalodus teeth in Yangquan City, Shanxi Province, North China marking the first fossil record in China and second in Asia. This finding contributes to the understanding of the diversity of petalodonts in eastern Asia, as well as shedding new light on their distribution and stratigraphic range.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2021)
Article
Geology
Natalia C. A. Brandao, Jonathas S. Bittencourt, Adolfo R. Calor, Marcio Mendes, Max C. Langer
Summary: A new genus and species of mayfly, Astraeoptera cretacica gen. et sp. nov., is described from the Lower Cretaceous limestone of the Crato Formation in Brazil. The study also reanalyzed the holotypes of two other mayfly species, resulting in taxonomical changes, and indicated the predominance of Hexagenitidae among Cretaceous mayflies in the Crato Formation.
CRETACEOUS RESEARCH
(2021)
Article
Zoology
Yan-Da Li, Gabriel Biffi, Robin Kundrata, Di-Ying Huang, Chen-Yang Cai
Summary: A new fossil species of Cantharidae, Nothotytthonyx serratus, is reported and tentatively attributed to the extant subfamily Malthininae. The discovery also suggests a possible Gondwanan origin for Malthininae.
Article
Entomology
Anderson Lepeco, Diego N. Barbosa, Gabriel A. R. Melo
Summary: Burmese amber is an important source of fossil insects from the Cretaceous period, with stinging wasps being the most common group. In this study, new aculeate families and genera are described and a fossil genus from China is reinterpreted. The discovery of a new aculeate family adds to the understanding of insect diversity during the Cretaceous.
JOURNAL OF HYMENOPTERA RESEARCH
(2022)
Article
Biodiversity Conservation
Sandra R. Schachat, Daniel G. Mulcahy, Joseph R. Mendelson
CONSERVATION BIOLOGY
(2016)
Article
Entomology
Sandra R. Schachat, Richard G. Robbins, Jerome Goddard
JOURNAL OF MEDICAL ENTOMOLOGY
(2018)
Article
Multidisciplinary Sciences
Sandra R. Schachat
ROYAL SOCIETY OPEN SCIENCE
(2017)
Article
Biology
Sandra R. Schachat, Conrad C. Labandeira, Matthew R. Saltzman, Bradley D. Cramer, Jonathan L. Payne, C. Kevin Boyce
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2018)
Article
Multidisciplinary Sciences
Sandra R. Schachat, Conrad C. Labandeira, S. Augusta Maccracken
ROYAL SOCIETY OPEN SCIENCE
(2018)
Article
Anatomy & Morphology
Sandra R. Schachat
JOURNAL OF MORPHOLOGY
(2019)
Article
Biology
Sandra R. Schachat, Conrad C. Labandeira, Matthew E. Clapham, Jonathan L. Payne
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2019)
Article
Biology
Sandra R. Schachat, C. Kevin Boyce, Jonathan L. Payne, David Lentink
Summary: The study found that veins with a diameter above approximately 50 microns conform to Murray's Law, while those below 50 microns become less likely to conform as they narrow. Most of the minute veins that are most likely to deviate from Murray's Law are also most likely to have atrophied, hindering efficient fluid transport. However, veins in many taxa continue to branch distally past areas of atrophy and conform to Murray's Law at larger diameters.
Article
Plant Sciences
Sandra R. Schachat, Jonathan L. Payne, C. Kevin Boyce, Conrad C. Labandeira
Summary: The study of insect herbivory in fossil record lacks a quantitative framework, and estimates of damage type diversity are generated with inconsistent sampling standardization routines. Coverage-based rarefaction has been shown to yield valid and reliable estimates of damage type diversity that are robust to differences among floral assemblages. A theoretical ecospace combining various metrics has the potential to distinguish between potential causes of increased herbivory.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2022)
Article
Biodiversity Conservation
Sandra R. Schachat, Jonathan L. Payne, C. Kevin Boyce
Summary: Current studies on insect herbivory in fossilized leaves mainly focus on a few simple metrics, ignoring the distribution of insect damage types among host plants. Complex metrics that link specific damage types to specific host plants have the potential to address additional ecological questions, but can be biased by sampling incompleteness. Through evaluations using resampling and subsampling exercises on various datasets, we found that beta diversity and rarefaction of interactions provide valid, reliable, and interpretable methods for comparing component and compound communities, respectively. Bipartite network metrics are inappropriate for fossil herbivory data due to sampling incompleteness, but alternatives exist for datasets with sufficient sample coverage.
Article
Paleontology
Sandra R. Schachat, S. Augusta Maccracken, Conrad C. Labandeira
Article
Entomology
Sandra R. Schachat, Richard L. Brown
AUSTRAL ENTOMOLOGY
(2018)
Article
Entomology
Sandra R. Schachat, Paul Z. Goldstein
INSECT SYSTEMATICS AND DIVERSITY
(2018)
Article
Entomology
Sandra R. Schachat
ARTHROPOD SYSTEMATICS & PHYLOGENY
(2017)